#12670: INA219 Power Monitoring Module (0-26V, 0-3.2A)

R75.60

The INA219 power monitoring module is a versatile breakout board that allows precise measurement of both high-side voltage and DC current draw using the INA219B chip. This chip offers 1% precision and communicates over I2C, making it easy to integrate into various projects. The module can handle high-side current measuring up to 3A at +26VDC, making it suitable for a wide range of applications.

Key features and specifications of the INA219 breakout module:

1. Precision DC Current Sensor: The module can measure DC current up to 3.2A with 1% accuracy using a 0.1 ohm 1% 2W current sense resistor. The internal 12-bit ADC provides a resolution of ±0.8mA at the ±3.2A range.

2. High-Side Voltage Measurement: The INA219 chip can measure the high-side voltage up to +26V, which is useful for tracking battery life or monitoring solar panels.

3. I2C Interface: The module communicates over the I2C bus, allowing easy integration with microcontrollers and other I2C devices. It supports 7-bit I2C addresses (0x40, 0x41, 0x44, 0x45), which can be selected using jumpers.

4. Small Size: The module has a compact PCB size of 22 x 20mm, making it suitable for space-constrained projects.

5. Temperature Range: The INA219 operates in a temperature range of -40°C to +85°C and offers a maximum error of 1% accuracy with a maximum offset of 100uV.

6. Calibration Programmable Registers: The INA219 allows calibration programmable registers to directly read the current in amperes and power in watts per reading.

7. Averaging and Filtering: The module supports up to 128 sampling averaging, enabling filtering in noisy environments.

8. Single Power Supply: The module operates on a single power supply voltage between +3.0V to +5.5V, making it compatible with a wide range of systems.

The INA219 is widely used in various applications, including server systems, notebook computers, power supplies, battery management, digital electric vehicles, and telecommunication equipment. Its high precision, small size, and low cost make it an ideal solution for power monitoring and control applications where accurate current and voltage measurements are crucial. The ability to communicate over I2C and the support for software programmable features further enhance its usability and flexibility in different projects.